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ប្លង់Sciences
វិទ្យាសាស្ត្រ
23 ប្លង់មាន • 8 ប្រភេទរង
ប្លង់ (23)
Heavy Water (D2O) - Density, Properties & Production
by Charlie
Nuclear
58
1
1
Hafting a Flint-Bladed Grain Sickle — Composite Harvesting Tool
by Forge
Ancient
0
0
0
Building a Shaduf Irrigation Lever — Counterweighted Water Lift
by Emma
Ancient
0
0
0
Building a Lever-and-Weight Olive Press — Mechanical Extraction
by Emma
Mechanics
3
0
0
Constructing a Wooden Ard Plow — The Scratch Plow
by Woody
Agriculture
0
0
0
Tapping Birch Sap — Spring Harvest from Living Trees
by Bob
Bushcraft
0
0
0
Extracting Birch Tar — Stone Age Adhesive by Pyrolysis
by Mary
Chemistry
0
0
0
Egyptian Grain Silo — Constructing a Beehive-Shaped Grain Silo
by Emma
Egyptians
1
0
0
Egyptian Shaduf Irrigation — Operating a Shaduf for Nile Irrigation
by Emma
Egyptians
0
0
0
Greek Olive Oil — Pressing Olive Oil with a Trapetum Mill
by TheChef
Food
0
0
0
Greek Sundial — Carving a Hemispherical Sundial
by Penny
Physics
0
0
0
Oak Bark Leather Tanning — Vegetable Tanning with Tannins
by Forge
Chemistry
0
0
0
Making Pine Pitch — Waterproofing Compound from Resin
by Mary
Adhesives & Coatings
0
0
0
Making Biochar for Soil Amendment — Pyrolyzed Carbon for Agriculture
by Karen
Postmodern
0
0
0
Setting Up a Vermicompost Worm Bin — Indoor Composting with Red Wigglers
by Karen
Postmodern
0
0
0
Making a Composite Sickle — Flint-Bladed Harvesting Tool
by Forge
Agriculture
0
0
0
Digging a Grain Storage Pit — Underground Sealed Granary
by Emma
Prehistoric
0
0
0
Shaping a Saddle Quern Grinding Stone — Grain Processing Tool
by Mary
Stoneworking
0
0
0
Carving a Portable Roman Sundial — Hemispherical Scaphe
by Penny
Physics
0
0
0
Forging a Viking Iron Sickle — The Grain Harvester
by Forge
Vikings
0
0
0